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Unformatted text preview: Solid Texture Synthesis from 2D Exemplars Johannes Kopf Chi-Wing Fu Daniel Cohen-Or Oliver Deussen Dani Lischinski Tien-Tsin Wong University of Konstanz Hong Kong University Tel Aviv University University of Konstanz The Hebrew University The Chinese University of Science and Technology of Hong Kong Figure 1: Examples of solid textures synthesized with our approach. Left: the statue appears to be carved out of a block of wood. Middle: volume rendering this solid texture with the brown texels rendered as transparent reveals intricate internal structure. Right: cutting off a part of the bunny reveals a consistent stone texture in the interior (we synthesized a displacement channel along with the RGB channels). The input 2D exemplars are shown next to the solid textured models. Abstract We present a novel method for synthesizing solid textures from 2D texture exemplars. First, we extend 2D texture optimization tech- niques to synthesize 3D texture solids. Next, the non-parametric texture optimization approach is integrated with histogram match- ing, which forces the global statistics of the synthesized solid to match those of the exemplar. This improves the convergence of the synthesis process and enables using smaller neighborhoods. In addition to producing compelling texture mapped surfaces, our method also effectively models the material in the interior of solid objects. We also demonstrate that our method is well-suited for synthesizing textures with a large number of channels per texel. CR Categories: I.3.7 [Computer Graphics]: Three-Dimensional Graphics and RealismColor, shading, shadowing, and texture Keywords: texture synthesis, solid texture 1 Introduction Texture mapping is one of the most essential techniques for realis- tic image synthesis, since it enables augmenting geometric models with rich and realistic visual detail. Texture synthesis techniques are thus of much interest. In this work we present a new method for synthesizing a 3D solid texture from a 2D exemplar. Solid textures [Peachey 1985; Perlin 1985] have several notable ad- vantages over 2D textures. First, many natural materials, such as wood and stone, may be more realistically modeled using solid tex- tures (see Figure 1). Second, solid textures obviate the need for finding a parameterization for the surface of the object to be tex- tured, which is a challenging problem in itself. In fact, for objects of general topology it is not possible to find a parameterization that avoids seams and/or distortion. Although these problems may be alleviated by synthesizing directly on the surface of an object (e.g., [Turk 1991; Turk 2001; Wei and Levoy 2001; Ying et al. 2001]), they cannot be avoided altogether....
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- Spring '08